While people in Japan put up decorations to celebrate different holidays, most of them are placed inside the home, such as the dolls for Girls’ Day/Hina Matsuri in March or the vegetables displayed during Obon in the summer. Out in public, though, though, you’d be hard-pressed to tell one Japanese holiday from another, with the exception of Children’s Day/Kodomo no Hi on May 5.

That’s because when Children’s Day rolls around, all you have to do is look up at all of the beautifully awesome carp streamers flying overhead,

In an empty field in Higashi-Matsushima, Miyagi Prefecture, where many homes stood before a tsunami swept them away, there are hundreds of blue carp streamers floating in the breeze. Kento Itoh, 21 years old, has collected them from all over the country in honor of his brother Ritsu, killed in the March 11 disaster when he was just five years old.

On that day, Kento was in Sendai, his middle brother was at school and his father was in the hospital, so none of them were at home when the tsunami struck their small town. Ritsu, his mother and his grandparents were carried off by the surging waters. Only Ritsu’s body was ever found. The rest are still officially missing.

With his father ill, it fell to Kento as the oldest son to identify his brother’s corpse at the morgue and to search among the ruins for his missing family. He did not find them, but among the mud and muck, he did find something: Ritsu’s beloved blue carp streamer.